Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
June 05, 2020, 01:49:44 01:49


Login with username, password and session length


Pages: 1 [2] 3 4 5 6 7 8 9 10
 11 
 on: June 02, 2020, 05:50:50 17:50 
Started by pushycat - Last post by pushycat
DIY Automatic Water Refiller (EFY March 2018)
Air coolers  provide  cool  air  in a room by adding moisture to the air. This moist air is blown inside the room by an exhaust fan or blower, which makes the room temperature drop. These coolers require frequent refilling of water. Presented here is a circuit to refill water automatically in an air-cooler tank when the  water  drops  below  a  predetermined level. It is built around NE555 timer (IC1),  transistor  BC547  (T1),  reed switches (S1 and S2), and a few other components. IC1 is configured similar to bi-stable mode, the only difference being that switch S1 is connected to pin 6 instead of pin 4.

Links are exclusively for Sonsivri members. Thus links are uploaded as attachment. Please do not share links in open forum

 12 
 on: June 02, 2020, 12:19:30 12:19 
Started by ibavaresco - Last post by ucdesign
Thank you for invitation. Registration is done.



Note: This message sent by the system behalf of ucdesign.

 13 
 on: June 02, 2020, 04:15:46 04:15 
Started by ibavaresco - Last post by jzaghal
This member is invited by me. Registration isn't completed yet.


Note: This message sent by the system behalf of jzaghal.

 14 
 on: June 01, 2020, 09:24:21 21:24 
Started by PM3295 - Last post by PM3295
I just want to share what happened to me when I updated my email address in my profile. After the change, I got the message to click on the verification email coming from the system. Well, I waited patiently for the email to arrive. Unfortunately, nothing came through. I requested another confirmation just to make sure. Still nothing; This went on for days. Every time I requested a new confirmation email, the system reported that the email was sent, but also displayed a tab-message that an error has occurred. You can't log in again without this email verification.

I tried several new requests to some other email addresses, but got the same error message. I thought there must be a way to contact the owners because it sure looked like some problem with the email verification system. To my surprise, it appears that you also needed the confirmation email for any type of contact help!

Today, after about a week, one of the confirmation emails eventually came through! Thank goodness.
I hope there are not more users who got caught up in this problem, and that the issue was discovered and fixed.

 15 
 on: June 01, 2020, 06:36:41 18:36 
Started by Siddh - Last post by Siddh
CountryIndia
NoteInterested in Learning PIXEL LED GUI Software Development. The Machine.id and Registration Generation. Successfully made the generation of Registration of 6,12,18 and working on 5.

This becomes much intoduction

 16 
 on: June 01, 2020, 05:56:08 17:56 
Started by Parmin - Last post by Vineyards
Hey guys,
I wonder if there are any AC output switchmode power supply?
Or is it even possible?

As far as I know it is possible. Transformers can be impractically heavy especially for mobile devices -a fact  that stood as a burden impeding further miniaturization of electronic devices for many decades. AC that we use today in our homes is merely 50/60Hz which requires a hefty size. The way SMTP achieves smaller sizes is through the increased increased efficiency that comes from higher frequencies involved. You can convert frequency either mechanically or electronically or try inverters. All of these existing solutions will usually result in bulkier and costlier implementations. Presently, SMTP stands out as the most logical option a: it is highly available, cheap, tried, tested and time proven.

If you can create a low cost, efficient AC to AC design for your device that will revolutionize the electronics world; you might as well forget about those 200 items and set out to promote that cutting edge power supply technology.

 17 
 on: June 01, 2020, 05:46:47 17:46 
Started by Parmin - Last post by Sideshow Bob
You can use PWM to create an AC form DC. This method is used by most modern power inverters. It will produce a good enough approximation to a sine wave in many cases. But if it is good enough for your load condition. I do not know. Anyway I found a free document here
https://digitalcommons.wpi.edu/cgi/viewcontent.cgi?article=1184&context=mqp-all

 18 
 on: June 01, 2020, 05:46:30 17:46 
Started by Parmin - Last post by pickit2
The devices used in the sim are only a token, to show it could work. it is not a finished project.

In works I have a good supply of 800 & 900 volt 60A Fets that are used in Microwave cookers.
we also have a supply for Induction Heaters. also high amps.

We have had a unit in the field using a similar design 12V 25A used 12hours a day for 18 years. 

 19 
 on: June 01, 2020, 05:36:52 17:36 
Started by Parmin - Last post by dennis78
@Parmin

Can you write some details as galvanic isolation, type of load, is output pure sine,...?







Posted on: June 01, 2020, 05:29:18 17:29 - Automerged

This works in proteus

If you use this try use a small dc power supply for the fet gates.
As it is you need to take care with high voltage that can harm you.

It is totall different topology from your first picture. First is impossible to work Smiley

Second design can work but for 200W, 24V-> 8A current, fets will burn for less than secs. Only way is pwm driving, but EMC for that design can be nightmare.

Easiest and more reliably way is standard DC psu, then inverter.

Best way is simple transformer good designed with quality core Cheesy


 20 
 on: June 01, 2020, 05:17:48 17:17 
Started by Parmin - Last post by pickit2
This works in proteus

If you use this try use a small dc power supply for the fet gates.
As it is you need to take care with high voltage that can harm you.

Pages: 1 [2] 3 4 5 6 7 8 9 10

DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC